1

Is it possible to create a table with the wpdb::prepare function?

I read the documentation and tried to find examples but there where none that helped me.

Even creating a table with prepare doesn't give me any useful examples on Google.

Currently I'm creating my table like this:

public function createTableFromFields( $tablename, $fields ) {

    //
    $wpdb = $this->db;
    $tablename = $wpdb->prefix . $tablename;

    $sql = 'CREATE TABLE IF NOT EXISTS ' . $tablename . ' (id INT(6) UNSIGNED
        AUTO_INCREMENT PRIMARY KEY';

    foreach ( $fields as $field ) {

        $sql .= ", $field TEXT";

    }

    $sql .= ')';

    $result = $wpdb->query( $sql );

    return $result;

}

But I learned that just using

$wpdb->query($sql)

is unsafe and that you should rather do it with

$wpdb->query(prepare($sql, $args).

So what do I put in $args here and what would be the SQL code then using the query format strings?

  • You have to add '%s' inside $sql where $tablename took and pass $wpdb->query(prepare($sql, $tablename , $field). What is iniside foreach loop $fields? – Sonali Mar 2 '17 at 5:35
0

I tried this in local, and I think you have multiple fields inside $fields so I've added them in array.

Just look at the code below; it works fine as tested:

add_action('your_hook', 'createTableFromFields');
function createTableFromFields($tablename)
{
    $wpdb = $this->db;
    $tablename = $wpdb->prefix . $tablename;
    $fields = array('PersonID','LastName');
    $sql = 'CREATE TABLE IF NOT EXISTS %s (id INT(6) UNSIGNED
        AUTO_INCREMENT PRIMARY KEY';
    $test = array();
    foreach ($fields as $field) {
        $test[] =  $field." TEXT";
    }
    $t = implode(",", $test);
    $sql .= ",%s)";

    $result = $wpdb->query($wpdb->prepare(sprintf($sql, $tablename, $t)));
    return $result;
}

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.